28 OverviewWhen WMM is used, all voice traffic originating from the wireless handset isassigned the WMM Voice Access Category, making it the highest priorityapplication. If the wireless network supports WMM, the handsets enableWMM support automatically; otherwise, SpectraLink Voice Prioritization(SVP) is used.Wired Equivalent PrivacyThe handsets support Wired Equivalent Privacy (WEP) as defined by the802.11a, b, and g specification. Nortel offers the product with both 40-bitand 128-bit encryption. WEP increases the security of the wireless LAN to alevel similar to a wired Ethernet LAN.Wi-Fi Protected AccessThe handsets support Wi-Fi Protected Access (WPA) using preshared key(PSK), as defined by the 802.11i specification. WPA increases the securityof the wireless LAN, using key encryption, key rotation, authentication andmessage integrity checking.Wi-Fi Protected Access2The handsets support Wi-Fi Protected Access2 (WPA2) using presharedkey (PSK) and Advanced Encryption Standard (AES), as defined by the802.11i specification. WPA2 increases the security of the wireless LAN,using key encryption, key rotation, data encryption, authentication, andmessage integrity checking.Virtual Private NetworkThe WLAN Handset 2212 supports Virtual Private Network (VPN) security.VPN security provides a secure tunnel for the transfer of unencryptedinformation. A two-phase approach is used to negotiate the tunnel, withPhase 1 protecting Phase 2. Phase 1 uses preshared keys, Diffie-Hellmangroup, hashing, and encryption. Phase 2 uses hashing and encryption.Both phases have limited, configurable lifetimes.Push-to-talk featureWith the Push-to-talk (PTT) feature, the WLAN Handset 2211 and theWLAN Handset 6140 can operate in a PTT group-broadcast mode like atwo-way radio, in addition to the standard telephone operation.For more information, see WLAN Handsets Fundamentals (NN43001-505).Text-messaging featureAll WLAN handsets support text messaging applications through the WLANApplication Gateway 2246. The application server communicates to theWLAN Application Gateway 2246 through a proprietary Open ApplicationNortel Communication Server 1000WLAN IP Telephony Installation and CommissioningNN43001-504 01.02 StandardRelease 5.0 15 June 2007Copyright © 2004-2007, Nortel Networks.
